2019/10/06

Parasitic organisms result from loss of information

Gene loss typically leads to parasitic organisms

https://www.nature.com/news/2010/100114/full/news.2010.11.html

Excerpt: "Nasonia females inject their eggs inside developing flies, leaving the young wasps to eat their way out. Studying Nasonia could help to improve the agricultural use of other wasps that behave in similar ways. Trichogramma, for example, is used to control pests on tomatoes, corn (maize) and apples.

The Nasonia genomes indicate that the wasps lack the genes required to synthesize certain amino acids, possibly owing to their exclusively carnivorous feeding habits."

https://www.medicalnewstoday.com/articles/286166.php

Excerpt: "Tapeworms show the largest loss of developmental genes of any animal examined to date," claimed geneticist Dr. Pete Olson.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6041341/

Excerpt: "Here we sequence the genome of Cuscuta australis. Our analyses reveal that the genome of C. australis experienced massive gene losses, including important genes involved in leaf and root development, flowering-time control, as well as defense against pathogens and insects."
 
https://www.cell.com/trends/genetics/pdf/S0168-9525(09)00064-X.pdf

Excerpt: "Second, the human parasite Brugia malayi lost otherwise essential genes most probably owing to the mutualistic relationship with a bacterial endosymbiont."


https://mbio.asm.org/content/10/4/e01541-19

Excerpt: "Parasites tend to evolve small and compact genomes, generally endowed with a high mutation rate, compared with those of their free-living relatives."

https://advances.sciencemag.org/content/5/4/eaav1110

Excerpt: "Parasite genomes are often characterized by a reduction in size, loss of genes, and loss of functions as the parasite becomes more dependent on the host. A. ceratii has retained most of the genome functionality of a free-living species, with the exception of the biosynthesis of a few amino acids and, more significantly, isoprenoids, which appears to be related to the loss of plastid organelles."

https://peerj.com/articles/7830.pdf

Excerpt: "The reduction in plastid genome size and gene content in parasitic plants predominantly results from loss of photosynthetic genes."

Excerpt: "They also compared the C. australis genome with the genomes of similar but non-parasitic plants from the same family, the Convolvulaceae.

The research team found about 11.7% of genes commonly found in photosynthetic plants do not exist in the dodder genome.

Editorial comment: Regressive for sure, and yes gene loss does help to explain how this plant went from being independent to becoming a parasite, but it is not evolution. Gene loss in the opposite of evolution. What has happened here is a degenerative process, which has forced the plant to become completely dependent on another plant to keep it alive for a while, until the parasitized plant is ‘bled dry’ and can no longer sustain itself as well as the totally dependent dodder, then they both die. The dodder plant has not become extinct because it hasn’t lost its ability to form flowers and set seed before it dies.

These findings fit well with Genesis, which tells us that God created plants in separate kinds in a very good world, where there were no dependent parasites that destroyed other plants. However, after man sinned, God cursed the ground and many plants have degenerated since then in varied ways – from shrinking in size, to forming thorns, and some have become parasites as they lost the ability to make and process their own food. Overall, this parasitic plant with its deficient genome is reminder that the real history of the world is from created perfection to degeneration, or to put it more plainly, from good to bad to worse."